Question:
If a = 2, b = – 2, find the value of: (i) a2+b2 (ii) a2+ab+b2(iii) a2–b2
If a = 2, b = – 2, find the value of: (i) a2+b2 (ii) a2+ab+b2(iii) a2–b2
Updated On: Jan 26, 2024
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Solution and Explanation
(i) a2+b2 = (2)2+(-2)2 = 4+4=8 [putting a=2,b=-2]
(ii) a2+ab+b2 = (2)2+(2)(-2)+(-2)2 = 4-4+4=4 [putting a=2,b=-2]
(iii)a2–b2 = (2)2-(-2)2 = 4-4=0 [putting a=2,b=-2]
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